This is introductory text. In general, it is not possible to use headers in this text.
This is a second column of introductory text.
The code for this visualisation is almost exactly the same as last week, except that I added the track_name to my aes function so that plotly can see it. Note that I still decided to keep a few static labels to invite the viewer to look. If you follow the documentation, ggplot can draw circles and squares, too!
And here is some new text.